The June 22 so-called supermoon rises over Table Rock and the lighted cross near Boise, Idaho. A supermoon occurs when the moon is closer to Earth than it typically is, and the effect is most noticeable when it occurs at the same time as a full moon, says James Garvin, chief scientist at NASA's Goddard Space Flight Center. Kyle Green, The Idaho Statesman, via AP

The supermoon outlines a cotton candy vendor at the Los Angeles Angels' baseball game on June 22 in Anaheim, Calif. Mark J. Terrill, AP

The moon rises behind the Washington Monument on June 23 in Washington. The moon appeared up to 14 percent larger than normal as our celestial neighbor swung closer to Earth, reaching its closest distance in a year early Sunday morning. Bill Ingalls, NASA, via AP

A hazy supermoon shines behind the lighted smokestacks at the Alamo Quarry Market, formerly a cement factory, on June 22 in San Antonio, Texas. Eric Gay, AP

The moon rises through a hazy sky past a string of green lights on June 22 in Baltimore. Patrick Semansky, AP

The supermoon sets behind the Statue of Liberty early on June 23 in New York.The moon was the closest to Earth and largest full moon of the year, according to astronomy website EarthSky. Julio Cortez, AP

The supermoon sets by the exterior of the state Capitol in Jackson, Miss., early on June 23. Rogelio V. Solis, AP

The supermoon rises next to the ancient Greek temple of Poseidon at Cape Sounion south of Athens, Greece, on June 23. Aris Messinis, AFP/Getty Images